Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: S: N- h% w2 w% c8 o p& v3 G4 ZNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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{9 b3 K; _* I! S9 R1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 2 g3 A" S+ K8 X ?
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 e6 ?- E, J8 X; }
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 8 j2 \& l0 k, H3 j& m2 x9 |9 u9 Y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan & _* k1 Q" {7 U z9 v) ~
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 8 m3 `, l- S8 @& H
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan . A$ t- w" Z; [, S) \
7Kinki University School of Medicine, Osaka 589-8511, Japan 4 A+ z0 j7 l9 \ g; J$ F
8Izumi Municipal Hospital, Osaka 594-0071, Japan ' d3 ?+ ?/ I) c8 z' G& S& x: B0 \
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
* N8 F5 L' ]! j% qCorrespondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp % u0 E. W$ ]+ e5 i" f A
AbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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